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Science Sample Paper 5 class -Xth

 Science Sample Paper

Section-A


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1.A ray of light is incident on a concave mirror after passing through the centre of curvature.What is the angle of incidence?

2.The element with atomic number 14 is hard and forms acidic oxide and a covalent halide.To which of the category (metal,non-metal or metalloid) does the element belong ?

3.Why does the sun near the horizon appear flattened at the sunset and sunrise?

4.What will be tubular thread-like structures bearing sporangia at their tip in rhizopus?

5.Consider the following reaction between an acid and a base .

XOH+ HY-------->XY +H2O
Which one is the cationic part of the salt?

Or
In which of the following reactions , hydrochloric acid is not behaving as an acid?
HCl(aq)+AgNO3(aq)------>AgCl(s)+HNO3(aq)
2HCl(aq)+CaCO3(s)------->CaCl(aq)+H2O(l) +CO2(g)

6.Why does the letter appear to be raised when viewed through a glass slab placed over the document ?
Or
Which quantity does not change in the phenomenon of refraction of light?

7.The positions of four element A,B,C and D in the modern periodic table are shown below.Which element forms the stongest base?
           GROUP NO.        PERIOD NO.
A- .    1.                           3
B.      13.                         3
C .     16.                         2
D .     18.                        3

8.How does the resistance of a wire vary with it's area of cross-section?
Or
Why is silver wire not used for electricity transmission?

9.Why does leaf appear green?
Or
Give two overall chemical equation representing aerobic and anaerobic respiration.

10.What is AIDS ?Which microbe is responsible for AIDS infection ?
Or
Explain two methods of contraception.

11. did television get dark patch when magnet is brought near it's screen?

12.What are two kinds of natural resources?

13.How do Mendel's experiment show that trait are inherited independently?


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Assertion-Reason Type Questions (Q.no.-14-16)
In each of the following questions , a statement of Assertion is given by the corresponding statement of Reason.Of the statemets ,mark the correct answer as
a)If both assertion and reason are true and reason is the correct explanation of assertion.
b)If both assertion and reason are true but reason is not a correct explanation of Assertion .
c)If assertion is true,but reason is false.
d)If Assertion is false,but reason is true.

14.Assertion :- In the following chemical equation,
CuO(s) + Zn(s)----------->ZnO(s) +Cu(s)
Zinc is getting oxidised and copper oxide is getting reduced.
.Reason:- The process in which oxygen is added to a substance is called oxidation whereas the process in which oxygen is removed from a substance is called reduction.

Or
Assertion- Quick lime reacts vigorously with water releasing a large amount of heat.
Reason- The above chemical reaction is an exothermic reaction.

15.Assertion:- When enters a denser medium, it's speed reduces and it bends towards the normal.
Reason:- One light year is equal to 9.5× 10^13 km

16.Assertion:- Vasectomy is a surgical method of birth control.
Reason:- In vasectomy ,small portion of ovidut is cut or tied properly.

Case Study
17.Read the following and answer any four questions from 17.i. to 17.v.
i.The substance B show which of the following properties?
I It is the strongest base among the given substance.
II.It is used in antacids.
III.It turns litmus paper to blue.
IV.None of the above
a)I and II
b)I,II,III
c)II,III
d)IV

ii.The substance D show which properties?
a)It can be used as baking soda.
b)It is used in fine extinguisher.
c)It turns red litmus paper to blue.
d)All of the above.

iii.Which substance may be used in cakes to make them fluffy.
a)E
b)B
c)D
d)C

iv.Arrange the substance in increasing order of their acidic strenght (A.C,E)
a)C<E<A.
b)A<E<C
c)A<C<E
d)E<C<A

v.Which of the following statement is correct?
a)Substance E can used as preservative in pickles .
b) Substance D can be used in anti-acid.
c) Substance B can also used in preservative.
d)None of the above.

18.
The electrical resistivities of some substances at 20°C are given in the following table 

i.Which amongst the following substance dissipates the maximum power?
a)Silver
b)Mercury
c)Copper
d)Nichrome

ii.In the following circuits ,heat produced in the resistor or combination of resistors connected to a 12V battery will be 
a)same in all cases .
b)maximum in case i
c)maximum in case ii
d) maximum in case iii 

iii.In the table given below ,which of the wires has minimum resistance ?
a)C
b)D
c)E
d)F

iv) If the length of a tungsten filament is 4m and it's area of cross -section is 12.8m^2,the resistance of the filament is 
a)1.625×10^-8Ω
b)1.269×10^-8Ω
c)16.25×10^-8Ω
d)12.69×10^-8Ω

v)The voltage versus current of a metallic conductor at two different temperature T1 and T2 is shown in figure.
Or
Choose the correct statement.
a)Heat produced at T1 is equal to that produced at T2.
b)Heat produced at T1 is greater than that produced at T2.
c)Heat produced at T2 is greater than that produced at T1.
d)Heat produced is independent of the temperature.

19.
Energy flow in an ecosystem is unidirectional.The main source of energy for an ecosystem is radiant or light energy derived from the Sun.From solar energy reaching the Earth's surface ,green plants capture only about 1% of the energy of sunlight falling on their leaves and convert it into food energy.

i. In an ecosystem ,a tiger predating on a deer while feed on fresh green grass.What percentage amount of energy accumulated by the deer would be required by tiger ?
a)1%
b)10%
c)100%
d)0.10%

ii.The diagram shows a food web in woodland .

In this food web,the beetles are
a)Carnivores 
b) Decomposers 
c)Herbivores.
d)Producers .

iii.

              a.             b.              c.               d
a)Deer.            Rabbit .       Front.       Rat
b)Dog.            Squirrel .     Bat.          Deer 
c)Rat .            Dog .            Tortoise .    Crow
d)Squirrel .   Cat .             Pigeon .      Pigeon

iv)Biological equilibrium is found among 
a)producers and consumers 
b)producers and decomposers 
c)producers,consumers and decomposers .
d)producer and light.

v)Bamboo plant is growing in a tropical rain forest .Than what will be it's trophic level?
a)First Trophic level(T1)
b)Second Trophic level(T2)
c)Third trophic level(T3)
d)Fourth trophic level(T4).


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20.
In female reproductive system is made up of the internal and external sex organs that function in reproduction of new offspring .In human ,the female reproductive system is immature at birth and develop to maturity at puberty to be able to produce gametes and to carry a foetus to full term.

i.The figure given depicts a diagrammatic scetional view of the human female reproductive system.Which set of three parts out of I-VI have been correctly identified?

a)II endometrium ,III infundibulum,IV fimbriae.
b)III infundibulum,IV fimbriae ,V cervix
c)IV oviducal funnel ,V uterus ,VI cervix.
d)I perimetrium ,II myometrium,III Fallopian tube.

ii.Fertilisation is a fusion of 
a)Diploid spermatozoan with Diploid ovum to form Diploid zygote.
b)Haploid spermatozoan with Diploid ovum to form Diploid zygote.
c)Diploid spermatozoan with haploid ovum to form Diploid zygote.
d)Haploid spermatozoan with haploid ovum to form Diploid zygote .

iii.The secretory phase in the human menstrual cycle is also called 
a)Luteal phase and lasts for about 6days.
b)Follicular phase and lasts for about 6days.
c)Luteal phase and lasts for about 13days.
d)Follicular phase and lasts for about 13 days.

iv) The diagram shows a side view of the female reproductive system.

In which region are sperms released during sexual intercourse and where does fertilisation usually takes place ?
          Sperms released     fertilisation
a) .      3 .                                1
b).      3.                                  2
c) .     4 .                                 1
d).      4.                                 2

v) What is reason for breast milk being better for a baby than better milk?
a)It contain antibodies for disease protection.
b)It contain calcium ion for bone development 
c)It contain protein for growth.
d)It contain sugar for energy.

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Thanks 
By Anuranjan Gadekar

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